What does it take for you to finish a book that you've started? The past two books that I have read have sucked me in easily enough and when that happens, it doesn't take much prodding to take the book to completion.
On the other hand, the book that I'm currently reading (Case Histories by Kate Atkinson) has turned out to be quite good here at the halfway point, but I really had to struggle at the beginning. It made sense once things got going, but the beginning of this book seemed to be just a series of stories told one after another.
The main reason that I kept going was because of the recommendations for it. I'm glad that I kept going, because it has been very rewarding so far. However, I'm not sure what the difference is between this book and others that I've started and never finished.
I've had similar situations with other books that have come on strong recommendations (I'm looking at you A Confederacy of Dunces) that I've enjoyed, but for some reason could never finish. Other books (Jonathan Strange & Mr. Norrell) sound like an awesome idea, but the writing style was just so boring that after 100 pages of slogging, I just quit.
At what point should I give up? I know that at some point I'll have to go back and finish Dunces, but that's because I liked it enough. Should I give a book all the way until the ending before I decide that it wasted a week of my life, or can I decide at the point that I can barely finish a page before falling asleep?
The sad thing is, I know how much better written the abovementioned books are than say... Twilight, but at least the Twilight series was able to suck me in (pun intended).